Home / 156,015.20-215,285.20-90,581.38

Finding the Fourth Proportional to 156,015.20, 215,285.20 and 90,581.38

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Solution

The fourth proportional to 156,015.20, 215,285.20 and 90,581.38 is: 124,993.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,015.20 : 215,285.20 = 90,581.38 : x
  2. Step 2: Convert to fraction form
    156,015.20/215,285.20 = 90,581.38/x
  3. Step 3: Cross multiply
    156,015.20x = 215,285.20 × 90,581.38
  4. Step 4: Simplify right side
    156,015.20x = 19,500,829,744.91
  5. Step 5: Solve for x
    x = 19,500,829,744.91/156,015.20
  6. Step 6: Final answer
    x = 124,993.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.